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EP0451945B1 - Procédé et dispositif pour la filtration de fluides - Google Patents

Procédé et dispositif pour la filtration de fluides Download PDF

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Publication number
EP0451945B1
EP0451945B1 EP91301901A EP91301901A EP0451945B1 EP 0451945 B1 EP0451945 B1 EP 0451945B1 EP 91301901 A EP91301901 A EP 91301901A EP 91301901 A EP91301901 A EP 91301901A EP 0451945 B1 EP0451945 B1 EP 0451945B1
Authority
EP
European Patent Office
Prior art keywords
fluid
heating means
fluid filter
filter
bypass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91301901A
Other languages
German (de)
English (en)
Other versions
EP0451945A1 (fr
Inventor
Edwin John Hardaker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rolls Royce PLC filed Critical Rolls Royce PLC
Publication of EP0451945A1 publication Critical patent/EP0451945A1/fr
Application granted granted Critical
Publication of EP0451945B1 publication Critical patent/EP0451945B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/02—Liquid fuel
    • F23K5/14—Details thereof
    • F23K5/18—Cleaning or purging devices, e.g. filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/22—Fuel supply systems
    • F02C7/224—Heating fuel before feeding to the burner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/30—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/02—Liquid fuel
    • F23K5/14—Details thereof
    • F23K5/20—Preheating devices

Definitions

  • the present invention relates to a fluid filter assembly and to a method of removing impurities entrained within a fluid which solidify to block the filter assembly at low temperatures.
  • the present invention relates to such a fluid filter assembly for use in the fuel system of a gas turbine engine.
  • a fuel heaten and filter assembly for internal combustion engines is known from DE-C-3631579.
  • the fuel system of a gas turbine aeroengine functions to provide the engine with fuel in a form and quantity required to suit all engine operating conditions.
  • a fuel pump delivers fuel to fuel spray nozzles which inject it into a combustion chamber in the form of an atomised spray.
  • the fuel is supplied to the fuel spray nozzles via a fuel filter which serves to remove particulate impurities from the fuel.
  • a heat exchanger is located between the fuel pump and the inlet to the fuel filter, see e.g. EP-A- 0 248 762.
  • the heat exchanger acts to transfer heat from a flow of oil to the fuel thereby cooling the oil.
  • the fuel liquid impurities entrained within the fuel such as water
  • a second heat exchanger may then be used which transfers further heat to the fuel.
  • the incorporation of an additional heat exchanger is however undesirable due to the extra weight and cost incurred.
  • the additional heat exchanger may be an air to fuel heat exchanger which will also result in a loss of engine efficiency as hot compressed air is taken from the engine compressor for this purpose.
  • the present invention seeks to provide a filtering assembly which eliminates the need to use an additional heat exchanger when water contaminated fuel is used at low temperatures.
  • a fluid filter assembly comprises a fluid filter having an inlet and an outlet to permit a flow of fluid therethrough to filter any solid impurities entrained within the fluid, heating means adjacent the inlet of the fluid filter to heat the fluid and any liquid impurities entrained therein prior to passing through the filter, and bypass means for allowing a proportion of the fluid to bypass the heating means and the fluid filter when a predetermined pressure differential exists across the heating means and the fluid filter, whereby in operation the bypass means for allowing a proportion of fluid to bypass the heating means and the fluid filter is normally closed so that all fluid flows through the heating means and the fluid filter, however when the fluid temperature is sufficiently low to cause blockage of fluid filter by solidification of the liquid impurities entrained therein, the bypass means is adapted to open to allow a proportion of fluid to bypass the heating means and the fluid filter when a predetermined pressure differential exits across the heating means, so that a reduced amount of fluid flows through the heating means, the magnitude of the reduction in the flow of fluid through the heating means being such
  • the bypass means for allowing a proportion of fluid to bypass the heating means and the filter is a duct incorporating a relief valve.
  • the relief valve may be pressure responsive and the duct may further incorporate a restrictor to limit the amount of fluid which can flow therethrough.
  • the heating means is preferably a heat exchanger.
  • a method of melting solidified liquid impurities blocking a fluid filter in a fluid filter assembly comprises the steps of, opening a bypass means associated with said fluid filter assembly to allow a proportion of a fluid to bypass the heating means and the fluid filter so that a reduced amount of fluid flows through the heating means and the fluid filter, heating the reduced amount of fluid flowing through the heating means to a temperature sufficiently high to melt the solidified liquid impurities in the fluid filter, and closing the bypass means so all the fluid flows through the heating means and the fluid filter once the solidified liquid impurities in the fluid filter have melted.
  • Figure 1 shows a schematic view of a filtering assembly in accordance with the present invention.
  • a fluid filtering assembly generally indicated at 10, comprises a heater 12 and a filter 14 which are in series fluid flow relationship with one another.
  • a bypass means for bypassing a proportion of the fluid around the heater 12 and the filter 14 when a predetermined pressure differential exists across the heater 12 and the filter 14 is provided.
  • the bypass means comprises ducts 16 and 22, and a relief valve 20 interposed between them.
  • the duct 16 includes a restrictor 18 which limits the amount of fluid which flows to the relief valve 20.
  • the relief valve 20 is spring loaded and will allow the passage of fluid from the duct 16 to the duct 22 only when the pressure of the fluid in the duct 16 is sufficient to open the valve against the action of opposing spring 19.
  • the relief valve 20 is closed so that all the fluid flows through the heater 12 and the filter 14.
  • a fluid such as fuel
  • the heater 12 is a heat exchanger in which heat is transferred from a fluid such as oil to the fuel thereby cooling the oil.
  • the heated fuel then flows to the filter 14 where any solid impurities entrained in fuel are filtered out. Filtering of the fuel keeps the fuel free from debris and prevents blockage of the fuel system further downstream.
  • the heat exchanger 12 cannot normally in extremely cold conditions provide sufficient heat to melt the ice particles entrained in the fuel which then pass to the fuel filter 14 and cause blockages.
  • the flow of fuel through the filter 14 is restricted and pressure builds up in the duct 16.
  • the pressure differential across the heat exchanger 12 and the filter 14 reaches a predetermined limit the pressure in the duct 16 is sufficient to open the relief valve 20 against the action of the opposing spring 19.
  • the fuel then flows from the duct 16 through the relief valve 20 to the duct 22.
  • the fuel bypasses the heat exchanger 12 and the filter 14 and rejoins the fuel system downstream of the filter 14.
  • a proportion of the fuel flows through the ducts 16 and 22 and the relief valve 20 interposed between them.
  • the amount of fuel flowing through the bypass is limited by the restrictor 18 which is located in the duct 16 adjacent the relief valve 20.
  • By allowing a proportion of the fuel to flow through the bypass a reduced flow of fuel passes through the heat exchanger 12 and the filter 14. This reduced flow is heated by the heat exchanger 12 to a temperature which is sufficiently high to melt the ice particles blocking the filter 14. The ice particles are quickly dispersed by the reduced flow of fuel which has been heated by the heat exchanger 12.
  • the filter 14 is unblocked allowing more fuel to flow therethrough.
  • the back pressure in the duct 16 reduces, causing the relief valve 20 to close under the influence of the spring 19.
  • the valve geometry is arranged such that closure of the relief valve 20 occurs at a lower pressure than that required to open the valve 20. This avoids the system stabilising with the valve 20 partially open and the filter blockage remaining constant. Closure of the relief valve 20 causes all the fuel to flow through the heat exchanger 12 and the filter 14 so that normal operation is restored.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filtration Of Liquid (AREA)

Claims (6)

  1. Ensemble de filtre de fluide comprenant:
       un filtre de fluide ayant une entrée et une sortie pour permettre un écoulement de fluide au travers du filtre, de façon à filtrer les impuretés solides entraînées dans le fluide,
       des moyens de chauffage près de l'entrée du filtre de fluide, pour chauffer le fluide et les impuretées liquides entraînées dans le fluide, avant de passer au travers du filtre,
       caractérisé en ce que l'ensemble de filtre de fluide comporte en outre des moyens de by-pass pour permettre à une partie du fluide de by-passer les moyens de chauffage et le filtre de fluide, lorsqu'un différentiel de pression prédéterminé existe au travers des moyens de chauffage et du filtre de fluide,
       de sorte qu'en fonctionnement, les moyens de by-pass pour permettre à une partie du fluide de by-passer les moyens de chauffage et le filtre de fluide sont normalement fermés, de façon que tout le fluide s'écoule au travers des moyens de chauffage et du filtre de fluide, mais, lorsque le température du fluide est suffisamment basse pour entraîner le blocage du filtre de fluide par solidification des impuretés liquides entraînées dans le fluide, les moyens de by-pass sont adaptés à s'ouvrir pour permettre à une partie de fluide de by-passer les moyens de chauffage et le filtre de fluide lorsqu'un différentiel de pression prédéterminé existe au travers des moyens de chauffage et du filtre de fluide, de façon qu'une quantité réduite de fluide s'écoule au travers des moyens de chauffage, l'amplitude de la réduction de l'écoulement de fluide au travers des moyens de chauffage étant telle que ledit fluide est chauffé à une température suffisamment élevée pour fondre les impuretés solides bloquant le filtre de fluide.
  2. Ensemble de filtre de fluide selon la revendication 1, caractérisé en ce que les moyens de by-pass pour permettre à une partie du fluide de by-passer les moyens de chauffage et le filtre de fluide, sont une conduite comportant une soupape de décharge.
  3. Ensemble de filtre de fluide selon la revendication 2, caractérisé en ce que la soupape de décharge est sensible à la pression.
  4. Ensemble de filtre de fluide selon la revendication 2 ou la revendication 3, caractérisé en ce que ledit conduit comporte un limiteur pour limiter la quantité de fluide qui peut s'écouler au travers dudit conduit.
  5. Ensemble de filtre de fluide selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de chauffage sont un échangeur de chaleur.
  6. Procédé pour faire fondre des impuretés liquides solidifiées bloquant un filtre de fluide dans un ensemble de filtre de fluide qui comporte des moyens de chauffage et un filtre de fluide en série dans le sens de l'écoulement de fluide, caractérisé en ce que le procédé comporte les étapes de:
       ouvrir des moyens de by-pass associés avec ledit ensemble de filtre de fluide, pour permettre à une partie d'un fluide de by-passer les moyens de chauffage et le filtre de fluide, de façon qu'une quantité réduite de fluide s'écoule au travers des moyens de chauffage et du filtre de fluide,
       chauffer la quantité réduite s'écoulant au travers des moyens de chauffage à une température suffisamment haute pour faire fondre les impuretés liquides solidifiées dans le filtre de fluide, et fermer les moyens de by-pass de façon que tout le fluide s'écoule au travers des moyens de chauffage et du filtre de fluide une fois que les impuretés liquides solidifiées dans le filtre de fluide ont fondu.
EP91301901A 1990-04-10 1991-03-07 Procédé et dispositif pour la filtration de fluides Expired - Lifetime EP0451945B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9008140 1990-04-10
GB909008140A GB9008140D0 (en) 1990-04-10 1990-04-10 An apparatus for and method of filtering a fluid

Publications (2)

Publication Number Publication Date
EP0451945A1 EP0451945A1 (fr) 1991-10-16
EP0451945B1 true EP0451945B1 (fr) 1993-08-04

Family

ID=10674226

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91301901A Expired - Lifetime EP0451945B1 (fr) 1990-04-10 1991-03-07 Procédé et dispositif pour la filtration de fluides

Country Status (5)

Country Link
US (1) US5124052A (fr)
EP (1) EP0451945B1 (fr)
JP (1) JPH04225810A (fr)
DE (1) DE69100220T2 (fr)
GB (1) GB9008140D0 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9913902D0 (en) * 1999-06-16 1999-08-18 Rolls Royce Plc An apparatus for and method of filtering a fluid
EP2110539B1 (fr) * 2000-02-28 2011-12-14 MAHLE Filtersysteme GmbH Filtre de gazole d'un moteur à combustion de véhicule
US6592047B1 (en) 2002-02-26 2003-07-15 General Motors Corporation Delayed action oil filter bypass valve
WO2005016489A1 (fr) * 2003-08-18 2005-02-24 Trond Helge Johnsen Procede et dispositif de purification d'un fluide liquide
KR100802182B1 (ko) * 2006-09-27 2008-02-12 한국전자통신연구원 나노선 필터, 그 제조방법 및 흡착물 제거방법, 이를구비한 필터링 장치
FR2928207B1 (fr) * 2008-02-29 2010-03-26 Hispano Suiza Sa Installation d'echangeur thermique
FR2960597B1 (fr) * 2010-05-25 2012-06-22 Snecma Dispositif a conduit de derivation dans un circuit de fluide
FR2962166B1 (fr) * 2010-07-01 2012-08-10 Snecma Dispositif a conduit de derivation dans un circuit de fluide
FR2979387B1 (fr) * 2011-08-31 2017-02-10 Snecma Circuit de carburant dans une turbomachine
US9222415B2 (en) 2012-03-06 2015-12-29 Hamilton Sundstrand Corporation Gas turbine engine fuel heating system
JP5836915B2 (ja) * 2012-11-07 2015-12-24 三菱電機株式会社 水熱交換器用フィルタ装置、この水熱交換器用フィルタ装置を備えた冷凍サイクル装置、及び水熱交換器への被捕捉物の付着抑制方法
WO2014112979A1 (fr) 2013-01-15 2014-07-24 United Technologies Corporation Séparateur de glace et de débris (ids) de système de carburant comprenant un écran de filtrage partiel et passage tortueux
JP6830049B2 (ja) * 2017-08-31 2021-02-17 三菱パワー株式会社 制御装置とそれを備えたガスタービンコンバインドサイクル発電システム、プログラム、およびガスタービンコンバインドサイクル発電システムの制御方法
US11077949B2 (en) * 2018-10-05 2021-08-03 The Boeing Company Dual turbine thermal management system (TMS)
EP3772630B1 (fr) * 2019-08-06 2022-03-23 Rolls-Royce Deutschland Ltd & Co KG Détection de blocage d'échangeur de chaleur
US11591964B2 (en) * 2021-06-17 2023-02-28 Pratt & Whitney Canada Corp. Oil cooling system for aircraft engine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925712A (en) * 1952-12-12 1960-02-23 Rolls Royce Aircraft fuel system with fuel heating means
GB859479A (en) * 1958-04-25 1961-01-25 Rolls Royce Aircraft fuel system
US3458414A (en) * 1967-11-24 1969-07-29 William W T Crane Swimming pool water conditioner
DE2623621C2 (de) * 1976-05-26 1978-04-20 Kloeckner-Humboldt-Deutz Ag, 5000 Koeln Einrichtung zum Beheizen der Bedienungskabine einer Maschine
US4696156A (en) * 1986-06-03 1987-09-29 United Technologies Corporation Fuel and oil heat management system for a gas turbine engine
DE3631579C1 (de) * 1986-09-17 1992-02-20 Daimler Benz Ag Niederdruckkraftstoffkreislauf mit Kraftstoffvorwaermung fuer eine luftverdichtende Einspritzbrennkraftmaschine,insbesondere fuer Nutzfahrzeuge
US4971704A (en) * 1989-09-05 1990-11-20 Electrolube Devices, Inc. System for purifying engine lubricating oil

Also Published As

Publication number Publication date
JPH04225810A (ja) 1992-08-14
DE69100220T2 (de) 1993-11-11
DE69100220D1 (de) 1993-09-09
GB9008140D0 (en) 1990-06-06
EP0451945A1 (fr) 1991-10-16
US5124052A (en) 1992-06-23

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